| Length(km) | Answer | % Correct |
|---|---|---|
| 3544 | Mississippi | 98%
|
| 3768 | Missouri | 97%
|
| 1575 | Ohio | 95%
|
| 2330 | Colorado | 91%
|
| 2830 | Rio Grande | 80%
|
| 1674 | Snake | 76%
|
| 2322 | Arkansas | 75%
|
| 1811 | Red | 75%
|
| 2000 | Columbia | 72%
|
| 1504 | Tennessee | 66%
|
| 3185 | Yukon | 63%
|
| 1230 | Green | 44%
|
| 1175 | Pecos | 38%
|
| 1091 | Yellowstone | 36%
|
| 1390 | Brazos | 31%
|
| 1458 | Canadian | 28%
|
| 1030 | North Platte | 24%
|
| 1120 | Cumberland | 23%
|
| 1159 | White | 22%
|
| 1140 | James | 20%
|
| 1123 | Cimarron | 9%
|
| 1005 | Milk | 9%
|
| 1130 | Kuskokwim | 7%
|
| 1560 | Colorado(Texas) | 4%
|